Paperboard fluid container



April 18, 1961 R. slsco PAPERBOARD FLUID CONTAINER 2 Sheets-Sheet 1 Filed Dec. 15, 1958 2 INVENTOFZ P/CHHED 5/560 ATTORNEY April 18, 1961 R. SISCO PAPERBOARD FLUID CONTAINER Filed Dec. 15, 1958 2 Sheets-Sheet 2 INVENTOR E/c/mzo S/sc NEY United Stts PAPERBOARD FLUE CONTAINER Richard Sisco,'470 Knollwood Road, Ridgewood, NJ. Filed Feb. 15, 1958, Ser. No. 789,351

Claims. (Cl. 222-==566) My invention relates to a paperboard fluid container and more particularly to an improved paperboard container which may be employed as a milk carton which carton can be used with standard filling and bottling equipment designed for use with glass bottles.

Containers made of paperboard, cardboard, strawboard, pasteboard,or the like are currently replacing glass bottles for distribution of milk to stores, homes, institutions, and coin-controlled merchandising machines.

These paperboard containers of the prior art cannot be filled by standard bottling equipment, nor can they be used with standard crimpable caps or snap caps which are used with glass bottles.

Glass bottles are expensive and must be replaced after an average use of six or seven times.- They must be collected, handled, cleaned, and sterilized. They cannot be used in vending machines since they are apt to become broken in the delivery arrangements customarily found in these.

In my copending application, Serial No. 775,969, filed November 24, 1958, for a Cardboard Milk Container, I have shown one construction adapted to overcome the disadvantages of the prior art. That application contemplates a folding paperboard construction having a reinforcing member adapted to be assembled in the container in nested relation with a truncated pyramid top.

The instant case instead of having the reinforcing member formed of a separate member adapted to be nested with the top has the reinforcing element formed integrally with the remainder of the container.

One object of my invention is to provide a paperboard container which can be used with standard bottling equipment designed for use with glass bottles so that my improved paperboard fluid container may be filled automatically.

Another object of my invention is to provide a paperboard container for milk or other liquids which can Withstand the pressure required for capping the paperboard container with capping machines designed for use with glass bottles. 7 V

Another object of my invention is to provide a paperboard container for liquids having a top in the form of a truncated pyramid which top is reinforced by a reinforcing member formed integrally with the paper blank from which the paperboard container is formed.

Other and further objects will appear from the following description: V

In general my invention contemplates the provision of a paperboard container folded from a single blank, which container is formed with a reinforced top. My container is formed with a square cross-sectional area having the 'top in the form of a truncated square pyramid. The

pyramid top is reinforced by providing an extended area of double thicknesses of paper adapted to transfer pressure from the top to the corners of the side walls of the container.

' In theaccompanyingv drawings which form of the instant specification and which are to be read in cona line 39 and extension 4! is assess Patented Apr. 18, 1%51 junction therewith and in which like reference numerals are used to indicate like parts in the various views:

Figure 1 is a perspective view of a paperboard container for liquids such as milk or the like containing one embodiment of my invention.

Figure 2 is a plan view of a blank which is adapted to be folded to form the container shown in Figure 1.

Figure 3 is a sectional elevation with parts broken away of the container shown in Figure l drawn on an enlarged scale.

Figure 4 is a fragmentary perspective view showing the top of my container in partially folded condition drawn on an enlarged scale. 1

Figure 5 is a sectional view drawn on a smaller scale viewed along the line 55 of Figure 3.

More particularly, referring now to the drawings, I form my container of any appropriate fibrous material such as paperboard, pasteboard, cardboard, strawboard, boxboard, juteboard, or the like. For purposes of convenience, I shall refer to this material as. paperboard hereafter in the specification and claims. The thickness of the paperboard stock will depend, of course, on the size of the container which I desire to make.

Referring now to Figure 2, the blank indicated generally by the reference numeral 10 is stamped out of a single piece of paperboard by an appropriate die. The panels 12, 14, 16, and 18 form the sides of the container. The tab 26 is adapted to be secured to the inside of the right-hand edge of the panel 12 by any suitable adhesive known to the art. Preferably, I employ an adhesive of the chemically processed'starch type which is insoluble and nontoxic.

The bottom tabs 22, 24, 26, and 28 are adapted to be folded over into a bottom which will be described more fully hereinafter. It will be understood, of course, that the bottom structure shown in my copending application, Serial No. 775,969, mentioned above, may be employed if desired.

The upper side of panel 12 is formed with tab 30 to which is attached three ears 32, 34, and 36. Ear 32 is adapted to be folded along line 33. Ear 34 is adapted to be folded along line 35, and car 36 is adapted to be folded along line 37. The tab 30 is adapted to be folded along line 31. Ear 36 is provided with a pair of extensions 38 and 40. Extension 38 is adapted to be folded along adapted to be folded along line 41. Y

Panel 14 is provided with a tab 50 adapted to be folded along line 51. The tab 50 is provided with cars 52, 54, and 56. The ear 56 is provided with apair of extensions 58 and 69. Ear 52 is adapted to be folded along line 53.

Ear 54 is adapted to be folded along line 55. Bar 56 is or any other suitable resinous material.

The panel 16 is provided with a tab adapted to be folded along line 71, The tab 70 is provided with three ears 72, 74, and 76. These ears are adapted to be folded along fold lines 73, 75, and 77 respectively. The ear 76 is provided with a pair of extensions 78 and 88 adapted to be folded along lines 79 and '81 respectively.

It will be observed that the tabs 30 and 79 andtheir; t V

' ears are symmetrical; The two semicircular portionsof ears 36 and 76 are adapted when folded to form a single circular opening aligned with the opening 62;

Attached to panel 18 along fold line ,89' is tab 88..

. The tab 88 is provided withvthreee'ars '82,. 84, and 86,

which ears are adapted to be folded along fold lines 83,

, 3 v 85, and 81 respectively. The

a circular opening ,92 which corresponds to thecircular opening 62. The tab 86, however is providedwith no extensions. a V e I f The widt-h ofg the pan'els 12; 1}, 15; am 1:; isms :7 am for each, thus providing a container-having a square cross-sectionalr'area whenffoldedif i Referring now toFigure'4fafterthe e520 hasbeen" V j glued to the edge of panel -12, the tabs 70am are 7 (folded towardreach other as 'shown in :Figure4, Y The 'ears'76a'nd' 36 are adapted to abut. Th'e extensions 46' jaindflti anathe extensions 38 and SOL-are folded down andfiikewise abuts-The e rs; 72 and 74 orf'ab qo' abut the edgesof extensions 78 and 80. Similarly, the earsr 3 4-ahd -32 er tab 3tiabut the'edges of extensions and 40' of-tab 36; The" arrangement of andfl e 'dimensions of the parts are such as to accomplish this and the parts ivill'dceupy theposition shown in'Figure 4: If desired, a mandrel (if-folding form maybe lei'nployed over which theparts'mayibe'folded readily, as will be understoodhythose skilled in the art.;

With the tabs Siiahd 70 and their ears and eittentab 86 is provided with tainer, however, is that shown in Figure 3L 'I'h e four braced therebetween. The particularTInode of heat- "sealing the,Vcontainerbottom 192 to thebot'tomfiabs 22,

Y 24, 26, and 28 is notpart oimy inven 'on but 'is' shown in the interest of-completeness.

'After the container, has been formed -7 as indicated above, it isimmersed so that alayer of p'arafiin is provided over the container walls both interior and exterior.

Referrin,g now to Figure the ieitterior rlayer of parafiin 1 is indicated by the reference numeral 104; and the interior layerof parafiin wai; is indic f d i sions in the position shown in, Eigure 4, an adhesive is r apnea-raise underside of tabs and 88 and their ears' andextensions, as indicated in" Figure 4; The shape and. a

' 'sizefof'the area'fo rrned by ears F n-island 72 and extensions 40 and 78 is such that it will occupy'the major portion of the 'area' of tab 88;. The fold line 73 Wi1i' COli1Cid6 with theifold line SSand the foldline 33 will coincide V was, the; role lineq83- V'Ihe tab 86 will exactly cover the 'area forrned by tabs 36 and 76 and the opening92"will coincide with the opening'formed by the two semicireular j ter 'tab 88 has; been folded vover,

adhesively' secured to the outside of tab 7 0 andfthe-ear shear-s4 will be 8}. will he adhesively secured'to the outside ofillab 3i).

Th :{parts arenow lin'postion torcomplete the; assembly r or the tfop of the container. j The Itab'SGiSifolded over the'assernbly 0f tab '74, extension 89, extension 38 and tab BZ. assembly will occupy a substantial poiftion portion or tab symmetrical Twith ear 84.: Similar1y, theearHSG. willoccupya portion of tab '30 symmetrical *withf'ear 82.: /The extension 58" will be adhered to tab' rangement of pa'rts rwilllbe thatshown in Figure l. The dimensions prime :parts ,I'areisn'ch 'that there will be a V- bridging across the complete lwidth offtab 70Q Ind a similat manner,iearisfi uwill heladheredto the exterior .of 'tabl3'0Tsyrnmetrical: with'ear 82;; The ex-f 6;:1 will occupyifa *po'sition xahuttin g theqedges 1 stab- 30.7 .The "ma geinent' will be symmetricalito' that tension formed'by ears 84 and 52 and extension 5 8.

. V Ihegsyrnmetry of the arra gementcanjr'eadilylbe V seen-by ieferen'ceto Figure jjin which the'dotted linesf v show thepositionof tabs andentensions on, the iexterior J Qfof thefcontainer and the full linesshow the position-of f'tabs and 'the extensions in the interior of the "container; 1 It will be observed that' all four sidesv of the pyramidtop of the containerfaite forrned with' substantially two thieka a ne rof; ma er iand. ha e; r zom op of the? 1 container: is f ogmed with three'ithickriessesf of material; a

II'have, thus in-effect; provided thei -top' ofgmy container 7 V with the equivalent of a reinforcin ontfainefhas beenlformed, the? removediand' the bottom of :1

a r 6% foldingmandrel; used;

a e anew; 1, The preferred; form of 7 bottom for e e nsert whichiis promy copending application byia separate 1 j the?- containe'r; nlay then" he'formed' as shovgn'in y eo 1 i the instant dn? 'waxiimpregnationi if desired. 1 I 1 It'will .be' 'seen' that L have accomplished .the'oojeets of my invention, My container isjr'ormed from asinglesheet of paperboard; material which is adapted to be foldedfito 7l1jin; abutting relation withe'ars84, and '52; The 'ar-" reference Waller features an sllb em w It is further obvious that variouschanges'mai from thespiritofjmyinvention; ltis derst'ood that my inventionishotib' speeific 'det'ailsrshown anddescribed one of. said recitangulafears; V70 lateral entenjsions, generally gu a're theflin'eof truncation 'o'f't e other at a temperature between 11 70 Fuand18O'F.n-1fhejcon t ainer is removed from the bath, thel iertcessfparaflin drained, and then the containez is chilledat teniperatu e in'wthe vicin ty Of' Qf 'tofs'et'the waxdmpregnation; t ewnta nq 'h h tefinalnh'sticPou in JPQl t 193, h w Fi i fsnepnetlr n i'p c 7' It I fisfunderstood, of course, that this pouringfspo'ut may be of any suitable material andmaybe insfe'rte'dhefore the form a container having a top in the" form of a truncated square pyramid. The pyrarnidis reinforcedwitha pin rality of iayers of paperboard'which are formed integrally from the blank. I am enabled in'rthis manner to obtain a reinforced top without the use of aiseparatejnesting reinforcing member. Iain thus able, to produce a Paper board container for liquids which can bereniployed with" 1 the standard filling and cappin'gjniachinery now, used 45 customarily for glass bottlesie 7 It will be underst'ood'that certain ieatures and subcombinati0n1s"are ofjlutility and may lbefemployed without his cont mp e y nd s wit ntheschpe hm details within the scope o ffrny'clalitns wl H2iving thusldescribed my inven v A Paperboard container lorflliqm 'hinationi a "single sheet o f paperboard. ma rial folded to provide the side Walls fandto'p era-jean: nlsaid' top I I {said si l r hap foldedrto form said side "wallsftabs ilhayin V gene'r ailyithe angular "tabs generally rectangular; ;eiite,i1:d1t g f h thel line,;of trmcationfof-two ealte'rnateitrluncatedtriang v lar:-tabs, said rectangularears heingfom orrne' in aligned position, and a pouring spout positioned in said aligned openings.

2. A paperboard container for liquids including in combination a single sheet of paperboard material folded to provide the side walls and top of a container, said top having the form of a truncated square pyramid, said sheet comprising four rectangular panels of similar shape folded to form said side walls, an integral laterally extending tab attached to an outer of said rectangular panels adapted to be adhered to the other outer of said rectangular panels to form a body section of substantially square cross-sectional shape, tabs having generally the shape of truncated triangles extending upwardly from each of said panels to form the sides of said truncated square pyramid, generally triangularly-shaped ears extending from each of the sides of each of said truncated triangular tabs, generally rectangular ears extending from the line of truncation of two alternate truncated triangular tabs, said rectangular ears being formed with notches, each of said rectangular ears being formed with a pair of lateral extensions, generally square ears extending from the line of truncation of the other pair of alternate truncated tabs, each of said square ears being formed with an opening symmetrical with the pair of said notches, one of said square ears being formed with a pair of lateral extensions, said notches and said openings being in aligned position, and a pouring spout positioned in said aligned openings.

3. A paperboard container for liquids including in combination a single sheet of paperboard material folded to provide the side walls and top of a container, said top having the form of a truncated square pyramid, said sheet comprising four rectangular panels of similar shape folded to form said side Walls, an integral laterally extending tab attached to an outer of said rectangular panels adapted to be adhered to the other outer of said rectangular panels to form a body section of substantially square cross-sectional shape when said sheet is folded, tabs extending from the bottom of each of said panels adapted to form part of the bottom portion of said container, tabs having generally the shape of truncated triangles extending upwardly from each of said panels to form the sides of said truncated square pyramid, generally triangularly-shaped ears extending from each of the sides of each of said truncated triangular tabs, generally rectangular ears extending from the line of truncation of two alternate truncated triangular tabs, said rectangular ears being formed with notches, each of said rectangular ears being formed with a pair of lateral extensions, generally square ears extending from the line of truncation of the other pair of alternate truncated tabs, each of said square ears being formed with an opening symmetrical with the pair of said notches, one of said square ears being formed with a pair of lateral extensions, said notches and said openings being in aligned position, and a pouring spout positioned in said aligned openings.

4. A paperboard container for liquids including in combination a single sheet of paperboard material folded to provide the side walls and top of a container, said top having the form of a truncated square pyramid, said sheet comprising four rectangular panels of similar shape folded to form said'side walls, an integral laterally extending tab attached to an outer of said rectangular panels adapted to be adhered to the other outer of said rectangular panels when said sheet is folded to form a body section of substantially square cross-sectional shape, tabs extending from the bottom oi each of said panels adapted to form part of the bottom portion of said container, a separate square paperboard member adapted to coact with said bottom tabs to form the container bottom, tabs having generally the shape of truncated triangles extending upwardly from each of said panels to form the sides of said truncated square pyramid, generally triangularly shaped ears extending from each of the sides of each of said truncated triangular tabs, generally rectangular ears extending from the line of truncation of two alternate truncated triangular tabs, said rectangular ears being formed with notches, each of said rectangular ears being formed with a pair of lateral extensions, generally square ears extending from the line of truncation of the other pair of alternate truncated tabs, each of said square ears being formed with an opening symmetrical with the pair of said notches, one of said square ears being formed with a pair of lateral extensions, said notches and said openings being in aligned position, and a pouring spout positioned in said aligned openings.

5. A paperboard container blank including in combination a single sheet of paperboard material having four rectangular panels of similar shape adapted to form the sides of the container, tabs having generally the shape of truncated triangles extending upwardly from each of said panels, generally triangularly shaped ears extending outwardly from each of the sides of each of said truncated triangular tabs, generally rectangular ears extending upwardly from the line of truncation of two alternate truncated triangular tabs, said rectangular ears being formed with notches, one of said rectangular ears being formed with a pair of lateral extensions, generally square ears extending upwardly from the line of truncation of the other pair of alternate truncated tabs, each of said square ears being formed with an opening symmetrical with said pair of notches and one of said square ears being formed with a pair of lateral extensions.

References Cited in the file of this patent UNITED STATES PATENTS 1,160,677 Van Wormer Nov. 16, 1915 1,770,226 Bliss July 8, 1930 1,861,206 Burgess May 31, 1932 2,290,185 Hinkle July 21, 1942 2,345,646 Williamson Apr. 4, 1944 2,702,152 Britton Feb. 15, 1955 2,778,561 Brunaa Jan. 22, 1957 

